Could not find or load main class with a Jar File

Question

I'm trying to load a jar using

@echo off java -jar Test.jar pause 

With the manifest of

Manifest-Version: 1.0 Main-Class: classes.TestClass 

In the Jar directory, I can clearly see a classes\TestClass file when I extract it.

Edit: classes.TestClass does have a public static void main(String[] args).

Package Deceleration in classes.TestClass is package classes;

But I still keep getting the error message

Could not find or load main class classes.TestClass 

I've been through everything I've been able to find with this problem, and none of it seems to help.

I've tried editing the classpath, redoing the manifest, installing the new JRE.

What else should I be doing?

Answer 1

I got it working like this:

TestClass.Java

package classes;  public class TestClass {      public static void main(String[] args) {         System.out.println("Test");     }  } 

Use javac on the command line to produce TestClass.class. Put TestClass.class in a folder classes/.

MANIFEST.MF

Manifest-Version: 1.0 Main-Class: classes.TestClass 

Then run

jar cfm test.jar MANIFEST.MF classes/ 

Then run it as

java -jar test.jar 

Answer 2

This error comes even if you miss "-" by mistake before the word jar

Wrong command java jar test.jar

Correct command java -jar test.jar